Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of Physics B Atomic Molecular and Optical Physics

Sequential two-photon double ionization of noble gas atoms

Anatoli S. Kheifets

Published Nov 5, 2007• 31 citations
Publisher

Abstract

We develop a formalism which describes sequential two-photon double ionization (TPDI) of a closed-shell atom. We apply this formalism to calculate the angular asymmetry parameters of sequential TPDI of the Ne 2p and Ar 3p valence subshells. Comparison with the latest experimental data is made.
DOI
10.1088/0953-4075/40/22/f02

Related papers

Angular correlations between two electrons emitted in the sequential two-photon double ionization of atoms

Грызлова Елена Владимировна, A N Grum-Grzhimailo, S. Fritzsche +1 more

Angular correlations between two emitted photoelectrons in the sequential two-photon double ionization (TPDI) of atoms are theoretically considered. The general expression for the angular correlation function is analysed and some particular geometries of possible experiments are discussed. The concept of true angular correlations is introduced in contrast to the angular dependence of the two-electron emission from two uncorrelated ionization events. The case of a pure LS coupling description of the TPDI is considered in detail and compared with the general case. As an example, calculations of the angular correlation functions are performed and discussed for sequential TPDI from the 4p valence shell of krypton.

Journal of Physics B Atomic Molecular and Optical Physics•Oct 29, 2010•24 citations

Angular distributions and correlations in sequential three-photon triple atomic ionization

Грызлова Елена Владимировна, A N Grum-Grzhimailo, S. Fritzsche +1 more

Angular correlations between photoelectrons in sequential triple three-photon ionization of noble gas atoms are calculated and analyzed. Angular distributions of first-, second- and third-step electrons are obtained. Preferential experimental geometries to observe the angular correlations are proposed.

Journal of Physics Conference Series•Nov 5, 2012•0 citations

Photoelectron angular correlation pattern in sequential two-photon double ionization of neon

Anatoli S. Kheifets

We apply an angular momentum coupling formalism to describe the angular correlation pattern in sequential two-photon double ionization of neon. Comparison with previous work (Fritzsche et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 165601 ) reveals some important differences which are discussed in terms of various ionization mechanisms and their theoretical implementations in two alternative approaches.

Journal of Physics B Atomic Molecular and Optical Physics•Jun 12, 2009•15 citations

Two-photon double ionization of atomic beryllium with ultrashort laser pulses

Frank L. Yip, Alicia Palacios, Fernando Martı́n +2 more

We investigate the two-photon double ionization of beryllium atom induced by ultrashort pulses. We use a time-dependent formalism to evaluate the ionization amplitudes and generalized cross sections for the ejection of the $2{s}^{2}$ valence shell electrons in the presence of a fully occupied $1{s}^{2}$ frozen core shell. The relative contributions of the two-photon direct and sequential process are systematically explored by varying both pulse duration and central frequency. The energy and angular differential ionization yields reveal the signatures of both mechanisms, as well as the role of electron correlation in both the single and double ionization continua. In contrast with previous results on the helium atom, the presence of an electronic core strongly affects the final state leading to back-to-back electron emission even in the a priori less correlated two-photon sequential mechanism. In particular, a dominant pathway via excitation ionization through the ${\mathrm{Be}}^{+}(2p)$ determines the profiles and pulse-duration dependencies of the energy and angle differential yields.

Physical Review A•Nov 5, 2015•9 citations

Угловые корреляции фотоэлектронов при последовательной двойной двухфотонной ионизации атома аргона

Грызлова Елена Владимировна, Грум-Гржимайло Алексей Николаевич, N M Kabachnik +2 more

The theory of sequential two-photon double ionization of atoms is applied to the angular correlation of two emitted electrons upon ionization of the Ar atom. The influence of the intermediate-ion polarization on the angular correlation functions is demonstrated. The results can be used in the design and interpretation of experiments with free-electron lasers.

•Jan 1, 2009•0 citations

Angular distributions of electrons in sequential two-photon double ionization of atoms by free electron laser radiation

Грызлова Елена Владимировна, A N Grum-Grzhimailo, N M Kabachnik +1 more

Calculated results for angular distribution and angular correlation of electrons produced in the process of two-photon double ionization of Xe are presented. In particular, a peculiar dependence of the angular distribution of the second step electrons on the alignment of the intermediate ionic state is predicted. The angular correlations of the electrons qualitatively depend on the term of the residual double charged ion. The results can be used in ongoing and future experiments with free-electron laser.

Scientific Herald of Uzhhorod University Series Physics•Jun 30, 2009•4 citations
Angular correlations between two emitted photoelectrons in the sequential two-photon double ionization (TPDI) of atoms are theoretically considered. The general expression for the angular correlation function is analysed and some particular geometries of possible experiments are discussed. The concept of true angular correlations is introduced in contrast to the angular dependence of the two-electron emission from two uncorrelated ionization events. The case of a pure LS coupling description of the TPDI is considered in detail and compared with the general case. As an example, calculations of the angular correlation functions are performed and discussed for sequential TPDI from the 4p valence shell of krypton.
We investigate the two-photon double ionization of beryllium atom induced by ultrashort pulses. We use a time-dependent formalism to evaluate the ionization amplitudes and generalized cross sections for the ejection of the 2s22{s}^{2}2s2 valence shell electrons in the presence of a fully occupied 1s21{s}^{2}1s2 frozen core shell. The relative contributions of the two-photon direct and sequential process are systematically explored by varying both pulse duration and central frequency. The energy and angular differential ionization yields reveal the signatures of both mechanisms, as well as the role of electron correlation in both the single and double ionization continua. In contrast with previous results on the helium atom, the presence of an electronic core strongly affects the final state leading to back-to-back electron emission even in the a priori less correlated two-photon sequential mechanism. In particular, a dominant pathway via excitation ionization through the Be+(2p){\mathrm{Be}}^{+}(2p)Be+(2p) determines the profiles and pulse-duration dependencies of the energy and angle differential yields.
Calculated results for angular distribution and angular correlation of electrons produced in the process of two-photon double ionization of Xe are presented. In particular, a peculiar dependence of the angular distribution of the second step electrons on the alignment of the intermediate ionic state is predicted. The angular correlations of the electrons qualitatively depend on the term of the residual double charged ion. The results can be used in ongoing and future experiments with free-electron laser.